fix(html): keyword-in-heading badge + brackets in wikilink descriptions

crates/nuwiki-core/src/ast/block.rs

@@ -53,6 +53,10 @@ pub struct PreformattedNode {
     pub span: Span,
     pub content: String,
     pub language: Option<String>,
+    /// Verbatim text after the opening `{{{`, trailing whitespace trimmed
+    /// (e.g. `python` or `class="brush: python"`). vimwiki inserts this as
+    /// raw attributes on the `<pre>` tag, so we preserve it for byte-parity.
+    pub attrs: String,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]